auxdisplay: ht16k33: Drop reference after LED registration

The reference count is bumped by device_get_named_child_node()
and never dropped. Since LED APIs do not require it to be
bumped by the user, drop the reference after LED registration.

[andy: rewritten the commit message and amended the change]

Fixes: c223d9c ("auxdisplay: ht16k33: Add LED support")
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/auxdisplay/ht16k33.c

@@ -483,6 +483,7 @@ static int ht16k33_led_probe(struct device *dev, struct led_classdev *led,
 	led->max_brightness = MAX_BRIGHTNESS;
 
 	err = devm_led_classdev_register_ext(dev, led, &init_data);
+	fwnode_handle_put(init_data.fwnode);
 	if (err)
 		dev_err(dev, "Failed to register LED\n");